$(function() {
  // select2
  $(".select2").select2({
    placeholder: "请选择分类"
  });
  /* 配置 */
  var config = {
    // 选完文件后，是否自动上传。
    auto: true,
    // swf文件路径
    swf: '/bower_components/fex-webuploader/dist/Uploader.swf',
    // 文件接收服务端。
    server: '../upload/avatar',
    // 选择文件的按钮。可选。
    // 内部根据当前运行是创建，可能是input元素，也可能是flash.
    pick: {
      id: '#imagesPicker',
      multiple: true
    },
    // 只允许选择图片文件。
    accept: {
        title: 'Images',
        extensions: 'gif,jpg,jpeg,bmp,png',
        mimeTypes: 'image/*'
    },
    // 缩略图选项
    thumb: {
      width: 220,
      height: 220,
      // 图片质量，只有type为`image/jpeg`的时候才有效。
      quality: 100
    }
  };
  /* .配置 */
  
  /* 回调 */
  // 上传列队添加成员
  var fileQueued = function( file ) {
      var $li = $(
              '<div id="' + file.id + '" class="file-item thumbnail">' +
                  '<img>' +
                  '<div class="info">' + file.name + '</div>' +
              '</div>'
              ),
          $img = $li.find('img');
      // 创建缩略图
      // 如果为非图片文件，可以不用调用此方法。
      // thumbnailWidth x thumbnailHeight 为 100 x 100
      uploader.makeThumb( file, function( error, src ) {
          if ( error ) {
              $img.replaceWith('<span>不能预览</span>');
              return;
          }

          $img.attr( 'src', src );
      });
      return $li;
  }
  // 上传进度监听
  var uploadProgress = function( file, percentage ) {
      var $li = $( '#'+file.id ),
          $percent = $li.find('.progress span');

      // 避免重复创建
      if ( !$percent.length ) {
          $percent = $('<p class="progress"><span></span></p>')
                  .appendTo( $li )
                  .find('span');
      }
      $percent.css( 'width', percentage * 100 + '%' );
  }
  // 上传失败回调
  var uploadError = function( file ) {
      var $li = $( '#'+file.id ),
          $error = $li.find('div.error');
      // 避免重复创建
      if ( !$error.length ) {
          $error = $('<div class="error"></div>').appendTo( $li );
      }
      $error.text('上传失败');
  };
  // 上传完成
  var uploadComplete = function( file ) {
      $( '#'+file.id ).find('.progress').remove();
  }
  // 上传成功
  var uploadSuccess = function(file) {
    $( '#'+file.id ).addClass('upload-state-done');
  }
  /* .回调 */

  // 设置file-url存值
  var imagesUrl = [];
  /* 主图多图上传 */
  // 初始化Web Uploader
  var imageUploader = WebUploader.create(config);
  // 上传回调
    imageUploader.on( 'fileQueued', function( file ) {
        $li = fileQueued(file);
        $('#ctlBtn').removeClass('hidden');
        if (config.pick.multiple) {
          $('#imagesList').append( $li );
        } else {
          $('#imagesList').html( $li );
        }
      })
    .on( 'uploadProgress', uploadProgress)
    .on( 'uploadError', uploadError)
    .on( 'uploadComplete', uploadComplete)
    .on( 'uploadSuccess', function( file, response ) {
        uploadSuccess(file);
        imagesUrl.push(response.url);
        $('#images').attr('value', JSON.stringify(imagesUrl));
    });
    $('#ctlBtn').click(function () {
      imageUploader.upload();
    });


    /* 详情多图上传 */
    var detailUrl = [];
    $wrap = $('#uploader'),

    // 图片容器
    $queue = $('<ul class="filelist"></ul>')
        .appendTo( $wrap.find('.queueList') ),

    // 状态栏，包括进度和控制按钮
    $statusBar = $wrap.find('.statusBar'),

    // 文件总体选择信息。
    $info = $statusBar.find('.info'),

    // 上传按钮
    $upload = $wrap.find('.uploadBtn'),

    // 没选择文件之前的内容。
    $placeHolder = $wrap.find('.placeholder'),

    // 总体进度条
    $progress = $statusBar.find('.progress').hide(),

    // 添加的文件数量
    fileCount = 0,

    // 添加的文件总大小
    fileSize = 0,

    // 优化retina, 在retina下这个值是2
    ratio = window.devicePixelRatio || 1,

    // 缩略图大小
    thumbnailWidth = 110 * ratio,
    thumbnailHeight = 110 * ratio,

    // 可能有pedding, ready, uploading, confirm, done.
    state = 'pedding',

    // 所有文件的进度信息，key为file id
    percentages = {},

    supportTransition = (function(){
        var s = document.createElement('p').style,
            r = 'transition' in s ||
                  'WebkitTransition' in s ||
                  'MozTransition' in s ||
                  'msTransition' in s ||
                  'OTransition' in s;
        s = null;
        return r;
    })(),

    // WebUploader实例
    uploader;

  if ( !WebUploader.Uploader.support() ) {
      alert( 'Web Uploader 不支持您的浏览器！如果你使用的是IE浏览器，请尝试升级 flash 播放器');
      throw new Error( 'WebUploader does not support the browser you are using.' );
  }

  // 实例化
  uploader = WebUploader.create({
      auto: true,
      pick: {
          id: '#filePicker',
          label: '点击选择图片'
      },
      dnd: '#uploader .queueList',
      paste: document.body,

      accept: {
          title: 'Images',
          extensions: 'gif,jpg,jpeg,bmp,png',
          mimeTypes: 'image/*'
      },

      // swf文件路径
      swf: '/bower_components/fex-webuploader/dist/Uploader.swf',

      disableGlobalDnd: true,

      chunked: true,
      server: '../upload/avatar',
      fileNumLimit: 300,
      fileSizeLimit: 5 * 1024 * 1024,    // 200 M
      fileSingleSizeLimit: 1 * 1024 * 1024    // 50 M
  });

  // 添加“添加文件”的按钮，
  uploader.addButton({
      id: '#filePicker2',
      label: '继续添加'
  });

  // 当有文件添加进来时执行，负责view的创建
  function addFile( file ) {
      var $li = $( '<li id="' + file.id + '">' +
              '<p class="title">' + file.name + '</p>' +
              '<p class="imgWrap"></p>'+
              '<p class="progress"><span></span></p>' +
              '</li>' ),

          $btns = $('<div class="file-panel">' +
              '<span class="cancel">删除</span>').appendTo( $li ),
          $prgress = $li.find('p.progress span'),
          $wrap = $li.find( 'p.imgWrap' ),
          $info = $('<p class="error"></p>'),

          showError = function( code ) {
              switch( code ) {
                  case 'exceed_size':
                      text = '文件大小超出';
                      break;

                  case 'interrupt':
                      text = '上传暂停';
                      break;

                  default:
                      text = '上传失败，请重试';
                      break;
              }

              $info.text( text ).appendTo( $li );
          };

      if ( file.getStatus() === 'invalid' ) {
          showError( file.statusText );
      } else {
          // @todo lazyload
          $wrap.text( '预览中' );
          uploader.makeThumb( file, function( error, src ) {
              if ( error ) {
                  $wrap.text( '不能预览' );
                  return;
              }

              var img = $('<img src="'+src+'">');
              $wrap.empty().append( img );
          }, thumbnailWidth, thumbnailHeight );

          percentages[ file.id ] = [ file.size, 0 ];
          file.rotation = 0;
      }

      file.on('statuschange', function( cur, prev ) {
          if ( prev === 'progress' ) {
              $prgress.hide().width(0);
          } else if ( prev === 'queued' ) {
              $li.off( 'mouseenter mouseleave' );
              $btns.remove();
          }

          // 成功
          if ( cur === 'error' || cur === 'invalid' ) {
              console.log( file.statusText );
              showError( file.statusText );
              percentages[ file.id ][ 1 ] = 1;
          } else if ( cur === 'interrupt' ) {
              showError( 'interrupt' );
          } else if ( cur === 'queued' ) {
              percentages[ file.id ][ 1 ] = 0;
          } else if ( cur === 'progress' ) {
              $info.remove();
              $prgress.css('display', 'block');
          } else if ( cur === 'complete' ) {
              $li.append( '<span class="success"></span>' );
          }

          $li.removeClass( 'state-' + prev ).addClass( 'state-' + cur );
      });

      $li.on( 'mouseenter', function() {
          $btns.stop().animate({height: 30});
      });

      $li.on( 'mouseleave', function() {
          $btns.stop().animate({height: 0});
      });

      $btns.on( 'click', 'span', function() {
          var index = $(this).index(),
              deg;

          switch ( index ) {
              case 0:
                  uploader.removeFile( file );
                  return;

              case 1:
                  file.rotation += 90;
                  break;

              case 2:
                  file.rotation -= 90;
                  break;
          }

          if ( supportTransition ) {
              deg = 'rotate(' + file.rotation + 'deg)';
              $wrap.css({
                  '-webkit-transform': deg,
                  '-mos-transform': deg,
                  '-o-transform': deg,
                  'transform': deg
              });
          } else {
              $wrap.css( 'filter', 'progid:DXImageTransform.Microsoft.BasicImage(rotation='+ (~~((file.rotation/90)%4 + 4)%4) +')');
              // use jquery animate to rotation
              // $({
              //     rotation: rotation
              // }).animate({
              //     rotation: file.rotation
              // }, {
              //     easing: 'linear',
              //     step: function( now ) {
              //         now = now * Math.PI / 180;

              //         var cos = Math.cos( now ),
              //             sin = Math.sin( now );

              //         $wrap.css( 'filter', "progid:DXImageTransform.Microsoft.Matrix(M11=" + cos + ",M12=" + (-sin) + ",M21=" + sin + ",M22=" + cos + ",SizingMethod='auto expand')");
              //     }
              // });
          }


      });

      $li.appendTo( $queue );
  }

  // 负责view的销毁
  function removeFile( file ) {
      var $li = $('#'+file.id);

      delete percentages[ file.id ];
      updateTotalProgress();
      $li.off().find('.file-panel').off().end().remove();
  }

  function updateTotalProgress() {
      var loaded = 0,
          total = 0,
          spans = $progress.children(),
          percent;

      $.each( percentages, function( k, v ) {
          total += v[ 0 ];
          loaded += v[ 0 ] * v[ 1 ];
      } );

      percent = total ? loaded / total : 0;

      spans.eq( 0 ).text( Math.round( percent * 100 ) + '%' );
      spans.eq( 1 ).css( 'width', Math.round( percent * 100 ) + '%' );
      updateStatus();
  }

  function updateStatus() {
      var text = '', stats;

      if ( state === 'ready' ) {
          text = '选中' + fileCount + '张图片，共' +
                  WebUploader.formatSize( fileSize ) + '。';
      } else if ( state === 'confirm' ) {
          stats = uploader.getStats();
          if ( stats.uploadFailNum ) {
              text = '已成功上传' + stats.successNum+ '张照片至XX相册，'+
                  stats.uploadFailNum + '张照片上传失败，<a class="retry" href="#">重新上传</a>失败图片或<a class="ignore" href="#">忽略</a>'
          }

      } else {
          stats = uploader.getStats();
          text = '共' + fileCount + '张（' +
                  WebUploader.formatSize( fileSize )  +
                  '），已上传' + stats.successNum + '张';

          if ( stats.uploadFailNum ) {
              text += '，失败' + stats.uploadFailNum + '张';
          }
      }

      $info.html( text );
  }

  function setState( val ) {
      var file, stats;

      if ( val === state ) {
          return;
      }

      $upload.removeClass( 'state-' + state );
      $upload.addClass( 'state-' + val );
      state = val;

      switch ( state ) {
          case 'pedding':
              $placeHolder.removeClass( 'element-invisible' );
              $queue.parent().removeClass('filled');
              $queue.hide();
              $statusBar.addClass( 'element-invisible' );
              uploader.refresh();
              break;

          case 'ready':
              $placeHolder.addClass( 'element-invisible' );
              $( '#filePicker2' ).removeClass( 'element-invisible');
              $queue.parent().addClass('filled');
              $queue.show();
              $statusBar.removeClass('element-invisible');
              uploader.refresh();
              break;

          case 'uploading':
              $( '#filePicker2' ).addClass( 'element-invisible' );
              $progress.show();
              $upload.text( '暂停上传' );
              break;

          case 'paused':
              $progress.show();
              $upload.text( '继续上传' );
              break;

          case 'confirm':
              $progress.hide();
              $upload.text( '开始上传' ).addClass( 'disabled' );

              stats = uploader.getStats();
              if ( stats.successNum && !stats.uploadFailNum ) {
                  setState( 'finish' );
                  return;
              }
              break;
          case 'finish':
              stats = uploader.getStats();
              if ( stats.successNum ) {
                  // alert( '上传成功' );
              } else {
                  // 没有成功的图片，重设
                  state = 'done';
                  location.reload();
              }
              break;
      }

      updateStatus();
  }

  uploader.onUploadProgress = function( file, percentage ) {
      var $li = $('#'+file.id),
          $percent = $li.find('.progress span');

      $percent.css( 'width', percentage * 100 + '%' );
      percentages[ file.id ][ 1 ] = percentage;
      updateTotalProgress();
  };

  uploader.onFileQueued = function( file ) {
      fileCount++;
      fileSize += file.size;

      if ( fileCount === 1 ) {
          $placeHolder.addClass( 'element-invisible' );
          $statusBar.show();
      }

      addFile( file );
      setState( 'ready' );
      updateTotalProgress();
  };

  uploader.onFileDequeued = function( file ) {
      fileCount--;
      fileSize -= file.size;

      if ( !fileCount ) {
          setState( 'pedding' );
      }

      removeFile( file );
      updateTotalProgress();

  };
  uploader.on('uploadSuccess', function (file, response) {
    detailUrl.push(response.url);
    $('#detail').attr('value', JSON.stringify(detailUrl));
  });

  uploader.on( 'all', function( type ) {
      var stats;
      switch( type ) {
          case 'uploadFinished':
              setState( 'confirm' );
              break;

          case 'startUpload':
              setState( 'uploading' );
              break;

          case 'stopUpload':
              setState( 'paused' );
              break;

      }
  });

  uploader.onError = function( code ) {
      alert( 'Eroor: ' + code );
  };

  $upload.on('click', function() {
      if ( $(this).hasClass( 'disabled' ) ) {
          return false;
      }

      if ( state === 'ready' ) {
          uploader.upload();
      } else if ( state === 'paused' ) {
          uploader.upload();
      } else if ( state === 'uploading' ) {
          uploader.stop();
      }
  });

  $info.on( 'click', '.retry', function() {
      uploader.retry();
  } );

  $info.on( 'click', '.ignore', function() {
      alert( 'todo' );
  } );

  $upload.addClass( 'state-' + state );
  updateTotalProgress();
});